Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3

被引：2
|
作者：
Mori, Kazuhiro [1 ]
Onodera, Yohei [1 ]
Kiyanagi, Ryoji [2 ]
Richardson, James W., Jr. [2 ]
Itoh, Keiji [1 ]
Sugiyama, Masaaki [1 ]
Kamiyama, Takashi [3 ]
Fukunaga, Toshiharu [1 ]
机构：
[1] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan
[2] Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA
[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 600卷 / 01期
关键词：
Mixed ionic-electronic conductor; Neutron diffraction; LaGaO3; OXIDE IONIC-CONDUCTIVITY; LAGAO3 PEROVSKITE OXIDE;
D O I：
10.1016/j.nima.2008.11.084
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Mixed ionic-electronic conductor of Fe doped lanthanum gallate, La0.8Sr0.2Ga1-xFexO3. has been studied by the dc four-probe method and the neutron powder diffraction. In the electrical conductivity measurement at RT, insulator-metal transition-like phenomenon was observed at around x similar to 0.35; this suggests an existence of the percolation limit for the electronic conductivity. Simultaneously, a bond length between O atoms. l(o-o), in a MO6 octahedron (M=Ga1-xFex) drastically expands over x similar to 0.4, according to the result of crystal structure refinement based on the hexagonal phase. Such a drastic expansion in the l(o-o) would induce the decrease in the oxygen ionic conductivity. (C) 2008 Elsevier B.V. All rights reserved.
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收藏
页码：328 / 331
页数：4
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